A cobporactdn of massachtt



Feb. 28, 1933. 4 w H, L R 1,899,200

CARVING MATERIAL Filed April 20, 1931 INVENTOR. Man? 17 KZAR .i yed A TTORNEYS.

Patented Feb; 28;] 1933 l UNITED STATES WALTER. H; KLAR, or SPRINGFIELD, MAssAcriusnI-rs, ASSIGNOR T MILTON: BRADLEY COMPANY, or

- sn'r'rs srnmerrnnn; MASSACHUSETTS} A CORPORATION or MASSACHU- cAnvme MATERIAL Application fil ed April 20,'19s1; Serial 1%. 531,-5oa.-

nature and cannot be'reli'ed upon to maintain its shape or form in sculpture work because of its pronenessto shrink as it dries out. My new materiahon the otherhand, will have all. the advantages of soap asto its'property of being easily cutand carved and will have the further advantageof being non-shrinkable, more permanent in character and more nearly akin to a stone in. its suitability for sculpture work.

My new material contains wax as one of its constituents and maybe molded or cast into blocks and slabs convenient for marketing and for special'uses such as for cameo work and basreliefs. 1 Likewise different slabs or pieces may be welded together for the fabrication of architectural models and monumental sampling, and it will find various uses in games for children and in gift shop materials.

A further feature of the invention which enhances its usefulness in the above fields is the possibility of its being made to simulate various types of marbles, the colors obtained ranging from White toblack in'all gradua-' tions, and in all types and colors fromwhite Carrara to the travertlme, includlng Vermont greys, Georgia p1nks,rs1enna browns and the like.

' relief carving;

Fig. 3 is a transverse sectional view of a cameo blank; and i Fig. 4 is a plan View of the blank shown in Fig. 3.

.The material consistsgen'erally of a inixture of wax and filler, so compoundedas to give the desiredconsistency, weight and high melting point. It, maybe colored-in theproeess .of manufacture to give a uniformchar;

acteristic appearance throughout the ma-- tena li I In the v of my invention as hereinafterspecifically described, considerations of low cost and a desirable high melting point for the composip odtatn or a suitable testament I tion have dictated the choice of the wax ma terials, and in the selection offiller the simulation of a soft stone or the fibrous character of a wood have been considered. a

A composition, suitable for carving is formed of stearic acid, low melting paraflin (scale w'ax),hard waX,- and a icomminuted inert filler whichmay beflithopone, chalk,

blancfix e (barium sulphate), wood flour, asbestos, talc, or anyother material of like nature. The use of wood flour 'or'asbestos as the filler will give the composite material a fibrous character so'that it may becarved and sawedlike wood.

A useful form of my invention may be formed by the followingmaterials in approximately the proportions specified;

.6 parts byweight of stearic acid i r I H 24: parts by weightof low melting parafiin 1 part by Weight of hard wax. i .75 parts by weight of terra alba.

In the foregoing formula, the stearic acidused has a melting point at approximately 128 F., the low meltingparaffin at approximately 121 F., and the hard wax at approximately 215 F. The resulting mixture should I have a melting point of 123. F. or somewhat higher, and the Waxes should be chosen and proportioned to achieve this result so that the completed compound will not soften at any normaltemperature. A relatively small pro portion of the hard wax willsuific'e to provide this necessary high melting point for the mixture. c c

' After melting the waxes they are incorporated with the filler, which has previously been warmed, by thorough mixing in a socalled Day mixer. When mixed, the whole is taken out and the various colors, which may be natural oxides or permanent chemical colors, are very carefully stirred in so as to keep the character of the wax from becoming muddy. The material is then poured into molds to give blocks such as shown at 1 in Fig. 1 or slabs 2 such as shown in Fig. 2. As shownat 3, the resulting blocks or slabs have a mar bleized appearance and coloring and as indicated at 4t this characteristic appearance is uniform throughout the material, rendering the material suitable for carving.

For cameo and similar work, the material is poured into the mold in two (or more) layers 5 and 6, thelayers being of difierent colors, to form blanks generally indicated at 7 of circu- V lar or other shape. 7 I

The specific composition above gives suflicient resistance to cutting to permit fine accurate work with a sharp tool and will retain itsshape under normal temperature conditions. It may be cut with a smooth wax-like finish and is capable of taking a high degree of polish similar to a stove. A soft abrasive will polish it with a gloss, and a more rough abrasive can be used to produce an egg-shell finish for the surface. 7

It will be understood that some variation may be made in the quantities of the material used to meet special conditions without departing from the scope of the invention.

What I claim is: V

'A material suitable for hand carving formed substantially by weight of 6 parts stearic acid, 24 parts low melting paraffin, 1 part hard wax, and 7 5 parts terra alba.

In testimony whereof I have afiixed my slgnature. 7 

